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Friction welding a 5052 aluminum alloy with different shape was investigated for the welding of a stud to plate. Both solid bar with five different size drilled holes and pipe were used for studs. The rotational plane was observed to move on the welded layer of the joints of stud to plate. Hardness distribution of the friction welded joints of pipe to plate indicated the existence of the softening areas at the heat affected zone of the pipe side. The hardness of the transferred metals of joints was higher than that of the plate, but was lower than that of the pipe. Both the maximum rupture load and elongation of friction welded joints of pipe to plate were lower than those of the base metals. Regardless of the diameter of drilled holes, the maximum rupture loads for all the welded joints were lower than those of the base metals. All the friction welded joints of pipe to plate were fractured at the transferred metals.
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KATO et al. (1991) studied this question.
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